Learn about this topic in these articles:

role in history of photography

…City in March 1840, when Alexander Wolcott opened a “Daguerrean Parlor” for tiny portraits, using a camera with a mirror substituted for the lens. During this same period, József Petzval and Friedrich Voigtländer, both of Vienna, worked on better lens and camera design. Petzval produced an achromatic portrait lens that…